minor mode

Musical mode

In music, a scale is an ordered series of musical intervals, which, along with the key or tonic, define the pitches. However, mode is usually used in the sense of scale applied only to the specific diatonic scales found below. Modality is the pitch relationships found in music using modes and contrasted with later tonality. The use of more than one mode is polymodal, such as with polymodal chromaticism. While all tonal music may technically be described as modal, music that is called modal often has less diatonic functionality and changes key less often than other music.

Modern

The modern conception of modes describes a system where each mode encompasses the usual diatonic scale but with a different tonic or tonal center. On a piano or other such keyboard instrument, one can find a diatonic scale by using the white keys. The seven-note scale starting on middle C is an Ionian scale. Going up the keyboard one gets a Dorian scale by starting on the D, a Phrygian scale by starting on the E, a Lydian scale by starting on the F, a Mixolydian scale starting on the G, an Aeolian scale starting on the A, and a Locrian scale starting on the B.

The modes can be arranged in the following sequence, where each mode has one more shortened interval in its scale than the one preceding it.

mode

Intervals in the modal scales

prime

second

third

fourth

fifth

sixth

seventh

Lydian IV

perfect

Major

Major

Augmented

Perfect

Major

Major

Ionian I

perfect

Major

Major

perfect

Perfect

Major

Major

Mixolydian V

perfect

Major

Major

perfect

Perfect

Major

minor

Dorian II

perfect

Major

minor

perfect

Perfect

Major

minor

Aeolian VI

perfect

Major

minor

perfect

Perfect

minor

minor

Phrygian III

perfect

minor

minor

perfect

Perfect

minor

minor

Locrian VII

perfect

minor

minor

perfect

diminished

minor

minor

The first three modes are termed major, the remaining four are minor. A mode is deemed major or minor by the intervallic relationship between the 1st and 3rd scale degrees. A mode is considered minor if the 1st and 3rd scale degrees form a minor 3rd (3 semitones above the root). A major mode instead has a major 3rd (4 semitones) from the 1st scale degree to the 3rd.

The Locrian mode is traditionally considered theoretical rather than practical because the interval between the 1st and 5th scale degrees is diminished rather than perfect, which creates difficulties in voice leading. However, Locrian is recognized in jazz theory as the preferred mode to play over a iiø7 chord in a minor iiø7-V7-i progression, where it is called a 'half-diminished' scale.

Major modes
The Ionian mode is identical to a major scale. The Lydian mode is a major scale with a raised 4th scale degree. The Mixolydian mode is a major scale with a lowered 7th scale degree.

Minor modes
The Aeolian mode is identical to a natural minor scale. The Dorian mode is a natural minor scale with a raised 6th scale degree. The Phrygian mode is a natural minor mode with a lowered 2nd scale degree.

Diminished modes
Locrian is the only mode with a lowered 5th or diminished 5th. This interval is the same distance (6 semitones from the first) as an augmented 4th which one would find in the lydian mode. Locrian's (I)'s seventh chord is naturally a half diminished seventh which is a diminished triad with a minor seventh on top. In Classical music, the Locrian exists only in theory, but certain Jazz musicians came at it 'through the back door,' as it were, and, not knowing that it was "supposed to be" only theoretical, used it.

Use

Modes came back into favor some time later with the developments of impressionism, jazz, (modal jazz) and more contemporary 20th century music.

The use and conception of modes or modality today is different from their use and conception in early music. As Jim Samson (1977, p.148) explains, "Clearly any comparison of medieval and modern modality would recognize that the latter takes place against a background of some three centuries of harmonic tonality, permitting, and in the nineteenth century requiring, a dialogue between modal and diatonic procedure."

The Ionian mode is another name for the major mode, in which much Western music is composed. The Aeolian forms the base of the most common Western minor scale; however, a true Aeolian mode composition will use only the seven notes of the Aeolian scale, while nearly every minor mode composition of the common practice period will have some accidentals on the sixth and seventh scale degrees in order to facilitate the cadences of western music.

Besides the Ionian major and modern (harmonic/melodic) minor modes, the other modes have limited use in music today. Folk music is often best analysed in terms of modes. For example, in Irish traditional music the Ionian, Dorian, Aeolian and Mixolydian modes occur (in roughly decreasing order of frequency); the Phrygian mode is an important part of the flamenco sound. The Dorian mode is also found in other folk music, particularly Latin and Laotian music, while Phrygian is found in some Central European or stylized Arab music, whether as natural Phrygian or harmonic Phrygian (Phrygian Dominant), which has a raised third (the so-called "gypsy scale"). Mixolydian mode is quite common in jazz and most other forms of popular music. Because of its dream-like sound, the Lydian mode is most often heard in soundtrack and video game music.

They have also been used in popular music, especially in rock music. Some notable examples of songs using modality include Scarborough Fair, which uses the Dorian mode, and many of the jam-songs of The Grateful Dead. The Dorian and Aeolian modes are also very prevalent in modern punk and post-hardcore music.

While remaining relatively uncommon in modern (Western) popular music, the darker tones implied by the flatted 2nd and/or 5th degrees of (respectively) the Phrygian and Locrian modes are evident in diatonic chord progressions and melodies of many guitar-oriented rock bands, especially in the late 1980s and early 1990s, as evidenced on albums such as Metallica's "Ride the Lightning" and "Master of Puppets", among others.

Chords

In jazz, the modes correspond to and are played over particular chords. (This is not entirely true. For this usage, scale on a chord, the correct term is "chord scale", not mode. Ex: The dorian chord scale is commonly played over the II-7 chord in a major key. Being in the dorian mode signifies that that particular chord is the tonic chord.) The chord examples below are shown for the modes of the key of C. For example, over an Fmaj711 chord, musicians typically play notes from the F Lydian mode (a Lydian chord scale over a IVma7 chord).

Mode

Ionian

Dorian

Phrygian

Lydian

Mixolydian

Aeolian

Locrian

Chord

Cmaj7

Dm7

Esus9 (or Em7)

Fmaj711

G7

Am7

Bø (Bm75)

Although both Dorian and Aeolian can be played over a minor seventh (m7) chord, the Dorian mode is most commonly used in straightahead jazz because the Dorian mode has a whole step between the 5th and 6th scale degrees, in contrast to the more jarring half step in the Aeolian. Also note that the most common jazz cadence or chord progression is a ii-V-I which suggests Dorian mode in the case of the ii chord.

Similarly, over a half-diminished (ø or m7♭5) chord, many jazz musicians will alter the Locrian mode by raising the second degree of the scale by a semitone, in order to form a major ninth over the chord (e.g. C over Bø), rather than the more dissonant minor ninth (e.g. C natural over Bø). This scale is also called the 6th mode of the melodic minor. And over the "sus9" chord, the sixth scale degree of the Phrygian mode is often raised by a semitone, in order to make a major sixth in the chord, rather than the more dissonant minor sixth. This mode is also called the 2nd mode of melodic minor. See Other modes below for more about the melodic minor modes and their associated chords.

Other types

In modern music theory, scales other than the major scale sometimes have the term "modes" applied to the scales which begin with their degrees. This is seen, for example, in "melodic minor" scale harmony, which is based on the seven modes of the melodic minor scale, yielding some interesting scales as shown below. The "Chord" row lists chords that can be built from the given mode.

Mode

I

II

III

IV

V

VI

VII

Name

Melodic Minor

Dorian 2

Lydian augmented

Lydian dominant

Mixolydian 6 or "Hindu"

half-diminished (or) Locrian Natural 2nd

altered (or) diminished whole-tone (or) Super Locrian

Chord

C-maj7

D-9

Emaj5

F711

G713

Aø (or) A-75

B7alt

Mode

I

II

III

IV

V

VI

VII

Name

Harmonic Minor

Locrian Natural 6th

Harmonic Major 5

Dorian 4

Phrygian major 3rd

Lydian 2

Super locrian diminished

Chord

C-minmaj7

Dø

E-maj75

F-7

G7

A-maj7 (or) A-minmaj7

B-Dim7

Most of these chords and modes are commonly used in jazz; the min/maj chord, 711 and alt were in common use in the bebop era (indeed, the Lydian dominant scale and 711 chord practically defined the bebop sound), while Coltrane-era and later jazz made extensive use of sus9 chords. Maj5 is less common, but appears in Wayne Shorter's compositions. The 67 is rarely seen as such.

Though the term "mode" is still used in this case (and is useful in recognizing that these scales all have a common root, that is the melodic minor scale); it is more common for musicians to understand the term "mode" to refer to Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, or Locrian scales. In everyday speech, this is the most common understanding. But in truth, any scale can be *used* as a mode by establishing its final as the tonal center and emphasizing its characteristic color pitches.

However, strictly speaking, for any possible scale, the number of possible distinct melodic modes is dictated by the pattern of intervals in the scale. For scales built of a pattern of intervals that only repeats at the octave, the number of modes is the number of notes in the scale: such 6-note scales have 6 modes, 5-note scales have 5 modes, etc. Scales that repeat their interval pattern at some subdivision of the octave, however, have only as many modes as notes within that subdivision: e.g. the diminished scale, which is built of alternating whole and half steps, has only two distinct modes, since all odd-numbered modes are equivalent to the first (starting on the whole step) and all even-numbered modes are equivalent to the second (starting on the half step). These scales are sometimes referred to as modes of limited transposition. The chromatic and whole-tone scales, each containing only steps of uniform size, have only a single mode each, as any rotation of the sequence results in the same sequence.

While most scales (a defined number of notes occurring in defined intervals) have commonly accepted names, most of the modal variations of the more obscure scales do not, and are instead referred to as "3rd mode of [your-scale-name-here]", etc.

Plato felt that playing music in a particular mode would incline one towards specific behavior associated with that mode, and suggested that soldiers should listen to music in Dorian or Phrygian modes to help make them stronger, but avoid music in Lydian, Mixolydian or Ionian modes, for fear of being softened. Plato believed that a change in the musical modes of the state would cause a wide-scale social revolution.

The philosophical writings of Plato and Aristotle (c. 350 BC) include sections that describe the effect of different musical modes on mood and character formation. For example, this quote from Aristotle's Politics:

Plato and Aristotle describe the modes to which a person listened as molding the person's character. The modes even made the person more or less fit for certain jobs. The effect of modes on character and mood was called the "ethos of music".

Western Church

There is a common misconception that the church modes (also called ecclesiastical modes) of medieval European music were directly descended from the Greek notion of modality mentioned above. In fact, the church modes originated in the 9th century. Authors from that period misinterpreted a text by Boethius, a scholar from the 6th century who had translated the Greek musical theory into Latin. In the 16th century, the Swiss theorist Henricus Glareanus published Dodekachordon, in which he solidified the concept of the church modes, and added four additional modes: the Aeolian, Hypoaeolian, Ionian, and Hypoionian. Thus, the names of the modes used today do not actually reflect those used by the Greeks.

The eight church modes, or Gregorian modes, can be divided into four pairs, where each pair shares the "final" note and the four notes above the final. If the "scale" is completed by adding three higher notes, the mode is termed authentic, while if the scale is completed by adding three lower notes, the mode is called plagal (serious). Otherwise explained: if the melody moves mostly above the final, with an occasional cadence to the sub-final, the mode is authentic. Plagal modes shift range and also explore the fourth below the final as well as the fifth above.

The pairs are organized so that the modes sharing a final note are numbered together, with the odd numbers used for the authentic modes and the even numbers for the plagal modes.

In addition, each mode has a "dominant" or "reciting tone", which is the tenor of the psalm tone. The reciting tones of all authentic modes began a fifth above the final, with those of the plagal modes a third above. However, the reciting tones of modes 3, 4, and 8 rose one step during the tenth and eleventh centuries with 3 and 8 moving from b to c' (half step) and that of 4 moving from g to a (whole step) (Hoppin 1978, p.67).

Only one accidental is used commonly in Gregorian chant—si (B) may be lowered by a half-step. This usually (but not always) occurs in modes V and VI, and is optional in other modes.

Given the confusion between ancient, Early, and modern terminology, "today it is more consistent and practical to use the traditional designation of the modes with numbers one to eight," (Curtis 1998) using Roman numeral (I-VIII), rather than using the pseudo-Greek naming system. Contemporary terms, also used by scholars, are simply Latin denominators: Protus, Deuterus, Tritus and Tetrardus, in practice used as : protus authentus / plagalis.

Use

Early music made heavy use of the Church modes. A mode indicated a primary pitch (a final); the organization of pitches in relation to the final; suggested range; melodic formulas associated with different modes; location and importance of cadences; and affect (ie, emotional effect). Liane Curtis (1998) writes that "Modes should not be equated with scales: principles of melodic organization, placement of cadences, and emotional affect are essential parts of modal content," in Medieval and Renaissance music. While it is true that other technical features such as reciting tones, cadences, and expressive qualities have roles in modal theory, it was nevertheless the scalar aspect of mode–in authentic and plagal forms–that was most universally described by theorists, and which has the greatest use in Renaissance polyphony. The use of cadences on important modal steps (especially the modal final) greatly helps to establish the sound of the mode, and once that has taken place, it is natural that the inherent expressive sounds of the modes are heard. The different orders of tones and semitones were widely recognized as creating the expressive qualities of the modes. Although today the significance of mode in Renaissance polyphony is being debated, most Renaissance theorists refer to the use of mode in polyphonic composition, and the principles of diatonic scale and practice of composing music around central pitches are so common in the music of this period that it is probable that composers did directly apply the modes to their compositions.

Most of the theoretical writings on Gregorian chant modes postdate the composition of the early Gregorian chant repertoire, which was not composed with the intention of conforming to particular modes. As a result, for these chants, the application of a mode number can be only approximate. Later chants, however, were written with a conscious eye on the eight modes.

Meier, Bernhard (1988). The Modes of Classical Vocal Polyphony, Described According to the Sources, translated from the German by Ellen S. Beebe, with revisions by the author. New York: Broude Brothers.